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  1. Hadoop HDFS
  2. HDFS-8469

Lockfiles are not being created for datanode storage directories

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    Details

    • Type: Bug
    • Status: Patch Available
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 2.4.0
    • Fix Version/s: None
    • Component/s: datanode
    • Labels:
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      Description

      Lockfiles are not being created for datanode storage directories. Due to a mixup, we are initializing the StorageDirectory class with shared=true (an option which was only intended for NFS directories used to implement NameNode HA). Setting shared=true disables lockfile generation and prints a log message like this:

      2015-05-22 11:45:16,367 INFO  common.Storage (Storage.java:lock(675)) - Locking is disabled for /home/cmccabe/hadoop2/hadoop-hdfs-project/hadoop-hdfs/target/  test/data/dfs/data/data5/current/BP-122766180-127.0.0.1-1432320314834
      

      Without lock files, we could accidentally spawn two datanode processes using the same directories without realizing it.

        Attachments

        1. HDFS-8469.001.patch
          1.0 kB
          Colin McCabe

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              • Assignee:
                cmccabe Colin McCabe
                Reporter:
                cmccabe Colin McCabe
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                Dates

                • Created:
                  Updated: